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Commit d6f220ea authored by Mengdong Lin's avatar Mengdong Lin Committed by Mark Brown
Browse files

ASoC: Define add/remove_dai_link ops for a soc card 



A machine driver can register the two ops.

When a DAI link is added or removed by a component's topology, the
ASoC core can call the ops to notify the machine driver for extra
intialization or destruction.

E.g. topology can create FE DAI links from a cpu DAI component, and
the machine driver may define an add_dai_link ops to set machine-specific
.init ops for the DAI link.

Signed-off-by: default avatarMengdong Lin <mengdong.lin@linux.intel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent f8f80361

include/sound/soc.h

+5 −0
Original line number Diff line number Diff line
@@ -1104,6 +1104,11 @@ struct snd_soc_card { 
				   struct snd_soc_dapm_context *dapm,

				   enum snd_soc_bias_level level);



	int (*add_dai_link)(struct snd_soc_card *,

			    struct snd_soc_dai_link *link);

	void (*remove_dai_link)(struct snd_soc_card *,

			    struct snd_soc_dai_link *link);



	long pmdown_time;



	/* CPU <--> Codec DAI links  */

sound/soc/soc-core.c

+12 −0
Original line number Diff line number Diff line
@@ -1260,6 +1260,12 @@ int snd_soc_add_dai_link(struct snd_soc_card *card, 
	}



	lockdep_assert_held(&client_mutex);

	/* Notify the machine driver for extra initialization

	 * on the link created by topology.

	 */

	if (dai_link->dobj.type && card->add_dai_link)

		card->add_dai_link(card, dai_link);



	list_add_tail(&dai_link->list, &card->dai_link_list);

	card->num_dai_links++;
@@ -1290,6 +1296,12 @@ void snd_soc_remove_dai_link(struct snd_soc_card *card, 
	}



	lockdep_assert_held(&client_mutex);

	/* Notify the machine driver for extra destruction

	 * on the link created by topology.

	 */

	if (dai_link->dobj.type && card->remove_dai_link)

		card->remove_dai_link(card, dai_link);



	list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {

		if (link == dai_link) {

			list_del(&link->list);